Transfer 100k to Mongo

<?php $m = new Mongo("mongodb://localhost/mongo");

$host = 'localhost';
$dbname = 'mongo';
$user = 'root';
$password = '';

$mysqli = new mysqli($host, $user, $password, $dbname);
if ($mysqli->connect_errno){
    echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
    exit;
}

$limit = 10000;
$offset = 0;
while(true){
    $res = $mysqli->query("SELECT * FROM basic ORDER BY id ASC LIMIT $offset, $limit");

    if($res->num_rows > 0){
        echo "Result set order... $offset, $limit \n";
        while ($row = $res->fetch_assoc()) {
            $o = new stdClass();
            $o->_id = $row['id'];
            $o->text = $row['text'];
            echo " id = " . $row['id'] . " . text = ".$row['text'].PHP_EOL;
            $m->mongo->basic->insert($o);
        }

        $offset += $limit;
    }else{
        echo 'Done'.PHP_EOL;
        die;
    }
}